Bugfixes: will (a) prevent an app from closing in direct-mode & (b) force close the download window (doesn't go away if there is nothing to download).

src/main/java/com/threerings/getdown/launcher/GetdownApp.java

@@ -171,8 +171,15 @@ public class GetdownApp
                 }
                 @Override
                 protected void exit (int exitCode) {
+                    if (invokeDirect()) {
+                        // Makes sure the "download" window really does go away (stays if nothing to download)
+                        disposeContainer();
+                    }
+                    else {
+                        // Calling exit on an directly invoked app would exit the app now! We call only for non-direct!
                         System.exit(exitCode);
                     }
+                }
                 protected JFrame _frame;
             };
             app.start();